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Dive into the research topics where Panagiotis Koutsovasilis is active.

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Featured researches published by Panagiotis Koutsovasilis.


12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017, Quality Hotel Globe, Stockholm, Sweden, 3 April 2017 through 7 April 2017 | 2017

Experimental acoustic characterization of automotive twin-scroll turbine

Raimo Kabral; Yasser El Nemr; Carlos Ludwig; Robert Mirlach; Panagiotis Koutsovasilis; A. Masrane; Mats Åbom

The present paper focuses on the experimental determination of automotive twin-scroll turbine acoustic performance. The unique test-rig for automotive turbocharger acoustics at KTH CCGEx laboratory is further developed to enable testing of modern twin-scroll turbines under controlled laboratory conditions. It is shown how the passive acoustic properties of such turbines can be accurately characterized by means of an acoustic three-port formulation. Governing equations along with the new test-rig design are presented and discussed in detail. Furthermore, complementary results from the first experimental determination of twin-scroll turbine acoustic three-port data are presented.


Archive of Applied Mechanics | 2015

Quantification of sub-synchronous vibrations for turbocharger rotors with full-floating ring bearings

Panagiotis Koutsovasilis; Nicolas Driot; Daxining Lu; Bernhard Schweizer


Journal of Sound and Vibration | 2016

Influence of hydrodynamic thrust bearings on the nonlinear oscillations of high-speed rotors

Ioannis Chatzisavvas; Aydin Boyaci; Panagiotis Koutsovasilis; Bernhard Schweizer


Multibody System Dynamics | 2013

Improved component mode synthesis and variants

Panagiotis Koutsovasilis


Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines | 2016

On the Influence of Thrust Bearings on the Nonlinear Rotor Vibrations of Turbochargers

Ioannis Chatzisavvas; Aydin Boyaci; Andreas Lehn; Marcel Mahner; Bernhard Schweizer; Panagiotis Koutsovasilis


Archive of Applied Mechanics | 2014

Parameter variation and data mining of oil-film bearings: a stochastic study on the Reynolds’s equation of lubrication

Panagiotis Koutsovasilis; Bernhard Schweizer


Archive of Applied Mechanics | 2017

Mode shape degeneration in linear rotor dynamics for turbocharger systems

Panagiotis Koutsovasilis


SAE Technical Paper Series | 2018

Influence of Compressor Recirculation Valve and Piping Design on the Acoustic Response of an Automotive Turbocharger

Nima Fard Afshar; Panagiotis Koutsovasilis


Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines | 2017

Experimental and Numerical Investigations of Turbocharger Rotors on Full-Floating Ring Bearings With Circumferential Oil-Groove

Ioannis Chatzisavvas; Gerrit Nowald; Bernhard Schweizer; Panagiotis Koutsovasilis


Proceedings of the 14th IFToMM World Congress | 2015

Influence of Circumferential Grooves on the Non-Linear Oscillations of Turbocharger Rotors in Floating Ring Bearings

Gerrit Nowald; Aydin Boyaci; Robert Schmoll; Panagiotis Koutsovasilis; Bernhard Schweizer

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Aydin Boyaci

Technische Universität Darmstadt

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Ioannis Chatzisavvas

Technische Universität Darmstadt

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Gerrit Nowald

Technische Universität Darmstadt

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Mats Åbom

Royal Institute of Technology

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Raimo Kabral

Royal Institute of Technology

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Andreas Lehn

Technische Universität Darmstadt

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